GPT-Image-2 Official Channel Image Generation

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-image-2-official",
    "prompt": "Ancient castle under the starry sky, cinematic lighting, hyper-realistic style",
    "size": "16:9",
    "resolution": "2k",
    "quality": "high",
    "n": 1
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-image-2-official",
    "prompt": "Snowy mountain sunrise panorama, extreme detail",
    "size": "16:9",
    "resolution": "4k",
    "quality": "high",
    "output_format": "jpeg",
    "output_compression": 90
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-image-2-official",
    "prompt": "Merge these two reference images into an illustrated poster, preserving the subject outlines",
    "size": "1:1",
    "quality": "high",
    "image_urls": [
      "https://example.com/input-a.png",
      "https://example.com/input-b.png"
    ]
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-image-2-official",
    "prompt": "Replace the background with a desert sunset",
    "size": "1:1",
    "quality": "medium",
    "image_urls": ["https://example.com/photo.png"],
    "mask_url": "https://example.com/mask.png"
  }'

const response = await fetch('https://toapis.com/v1/images/generations', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your-ToAPIs-key',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model: 'gpt-image-2-official',
    prompt: 'Ancient castle under the starry sky, cinematic lighting, hyper-realistic style',
    size: '16:9',
    resolution: '2k',
    quality: 'high',
    n: 1
  })
});

const task = await response.json();
console.log(task.id, task.status);

{
  "id": "tsk_img_01KPTXXXXXXXXXXXXXXX",
  "object": "generation.task",
  "model": "gpt-image-2-official",
  "status": "queued",
  "progress": 0,
  "created_at": 1703884800,
  "metadata": {}
}

POST

images

generations

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-image-2-official",
    "prompt": "Ancient castle under the starry sky, cinematic lighting, hyper-realistic style",
    "size": "16:9",
    "resolution": "2k",
    "quality": "high",
    "n": 1
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-image-2-official",
    "prompt": "Snowy mountain sunrise panorama, extreme detail",
    "size": "16:9",
    "resolution": "4k",
    "quality": "high",
    "output_format": "jpeg",
    "output_compression": 90
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-image-2-official",
    "prompt": "Merge these two reference images into an illustrated poster, preserving the subject outlines",
    "size": "1:1",
    "quality": "high",
    "image_urls": [
      "https://example.com/input-a.png",
      "https://example.com/input-b.png"
    ]
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-image-2-official",
    "prompt": "Replace the background with a desert sunset",
    "size": "1:1",
    "quality": "medium",
    "image_urls": ["https://example.com/photo.png"],
    "mask_url": "https://example.com/mask.png"
  }'

const response = await fetch('https://toapis.com/v1/images/generations', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your-ToAPIs-key',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model: 'gpt-image-2-official',
    prompt: 'Ancient castle under the starry sky, cinematic lighting, hyper-realistic style',
    size: '16:9',
    resolution: '2k',
    quality: 'high',
    n: 1
  })
});

const task = await response.json();
console.log(task.id, task.status);

{
  "id": "tsk_img_01KPTXXXXXXXXXXXXXXX",
  "object": "generation.task",
  "model": "gpt-image-2-official",
  "status": "queued",
  "progress": 0,
  "created_at": 1703884800,
  "metadata": {}
}

Note for users in mainland China: Please use https://toapis.cn as the API endpoint (Base URL). Replace https://toapis.com with https://toapis.cn in the examples in this document.

Official OpenAI gpt-image-2-official model
Async processing — returns a task ID for subsequent polling
Supports text-to-image, multi-reference image-to-image, and mask-based inpainting
13 aspect ratios with 1K / 2K / 4K resolution tiers
Up to 4 images per request, up to 16 reference images

Authorizations

string

required

All endpoints require Bearer Token authenticationGet your API Key from the API Key Management PageAdd to request header:

Authorization: Bearer YOUR_API_KEY

Body

string

default:"gpt-image-2-official"

required

Image generation model nameUse gpt-image-2-official

string

required

Text prompt describing the image to generateSupports English and Chinese; detailed descriptions of scene, style, and composition are recommended

string

default:"1:1"

Aspect ratioPreset values, or pass auto to let the upstream provider choose:1:1 · 3:2 · 2:3 · 4:3 · 3:4 · 5:4 · 4:5 · 16:9 · 9:16 · 2:1 · 1:2 · 21:9 · 9:21You may also pass any ratio in width:height format, such as 1:3 or 7:4, subject to the custom-size limits below.With auto, the upstream provider determines the final aspect ratio and pixel dimensions, so a fixed output is not guaranteed.

string

default:"1k"

Resolution tier

1k — 1024-base, fast and cost-effective (default)
2k — 2048-base, suitable for posters and high-definition needs
4k — 3840-base; high quality can take more than 120 seconds

Size Reference Table

size	1K	2K	4K
`1:1`	`1024x1024`	`2048x2048`	`2880x2880`
`3:2`	`1536x1024`	`2048x1360`	`3520x2336`
`2:3`	`1024x1536`	`1360x2048`	`2336x3520`
`4:3`	`1024x768`	`2048x1536`	`3312x2480`
`3:4`	`768x1024`	`1536x2048`	`2480x3312`
`5:4`	`1280x1024`	`2560x2048`	`3216x2576`
`4:5`	`1024x1280`	`2048x2560`	`2576x3216`
`16:9`	`1536x864`	`2048x1152`	`3840x2160`
`9:16`	`864x1536`	`1152x2048`	`2160x3840`
`2:1`	`2048x1024`	`2688x1344`	`3840x1920`
`1:2`	`1024x2048`	`1344x2688`	`1920x3840`
`21:9`	`2016x864`	`2688x1152`	`3840x1648`
`9:21`	`864x2016`	`1152x2688`	`1648x3840`

Custom Resolutions

In addition to the presets above, pass any ratio in width:height format through size. The service calculates pixel dimensions from the selected resolution tier. The resulting dimensions must meet all of these limits:

Both sides must be multiples of 16 pixels
The long edge can be at most 3,840 pixels (4K)
The aspect ratio can be at most 3:1
Total pixel count must be between 655,360 and 8,294,400

Examples:

size: "1:3" with resolution: "2k" → 1024x3072
size: "7:4" with resolution: "1k" → 1344x768

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-image-2-official",
    "prompt": "A simple red circle on a white background",
    "size": "7:4",
    "resolution": "1k",
    "quality": "medium",
    "n": 1
  }'

string

default:"high"

Image quality

low — fast and economical, suitable for drafts/previews
medium — balanced speed and quality
high — maximum detail, default value (4K + high can take 120s+)

string

default:"auto"

Background style of the generated image

auto — let the model decide (default)
transparent — transparent background
opaque — opaque background

Transparent backgrounds are best paired with PNG output.

string

default:"png"

Output format

png — default
jpeg — smaller file size (supports compression)

Azure OpenAI does not support webp format.

integer

default:100

JPEG compression level, range 0–100 (0 = no compression, 100 = maximum compression, default 100)Only applies when output_format is "jpeg"

integer

default:1

Number of images to generateRange: 1 ~ 10

string[]

Reference image URL array for image-to-image generation

Maximum 16 images, must be publicly accessible stable URLs
Use the Upload Image API to upload local files and get URLs

string

Mask image URL for inpaintingMust be used together with image_urls. The mask must match the dimensions of the first reference image and include an Alpha channel (transparent areas indicate regions to be repainted)

Response

string

Unique task identifier for status queries

string

Object type, always generation.task

string

Model name used

string

Task status

queued — waiting to be processed
in_progress — processing
completed — successfully completed
failed — failed

integer

Task progress percentage (0-100)

integer

Task creation timestamp (Unix timestamp)

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-image-2-official",
    "prompt": "Ancient castle under the starry sky, cinematic lighting, hyper-realistic style",
    "size": "16:9",
    "resolution": "2k",
    "quality": "high",
    "n": 1
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-image-2-official",
    "prompt": "Snowy mountain sunrise panorama, extreme detail",
    "size": "16:9",
    "resolution": "4k",
    "quality": "high",
    "output_format": "jpeg",
    "output_compression": 90
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-image-2-official",
    "prompt": "Merge these two reference images into an illustrated poster, preserving the subject outlines",
    "size": "1:1",
    "quality": "high",
    "image_urls": [
      "https://example.com/input-a.png",
      "https://example.com/input-b.png"
    ]
  }'

curl --request POST \
  --url https://toapis.com/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "gpt-image-2-official",
    "prompt": "Replace the background with a desert sunset",
    "size": "1:1",
    "quality": "medium",
    "image_urls": ["https://example.com/photo.png"],
    "mask_url": "https://example.com/mask.png"
  }'

const response = await fetch('https://toapis.com/v1/images/generations', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your-ToAPIs-key',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model: 'gpt-image-2-official',
    prompt: 'Ancient castle under the starry sky, cinematic lighting, hyper-realistic style',
    size: '16:9',
    resolution: '2k',
    quality: 'high',
    n: 1
  })
});

const task = await response.json();
console.log(task.id, task.status);

{
  "id": "tsk_img_01KPTXXXXXXXXXXXXXXX",
  "object": "generation.task",
  "model": "gpt-image-2-official",
  "status": "queued",
  "progress": 0,
  "created_at": 1703884800,
  "metadata": {}
}

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GPT-Image-2 Official Channel Image Generation

Authorizations

Body

Size Reference Table

Custom Resolutions

Response

​Authorizations

​Body

​Size Reference Table

​Custom Resolutions

​Response

Authorizations

Body

Size Reference Table

Custom Resolutions

Response